300 x slow close check valve by the main valve, check valve, needle valve, ball valve, micro shape filter and pressure gauge of hydraulic control of system. Using hydraulic automatic operation, can make the main valve to get the best opening or closing speed. Zhong prevent water of water hammer, slowly-closing silencing effect, in order to achieve the valve with electric valve, check valve and water hammer eliminator three functions. 300 x slow close check valve working principle when the valve from the inlet water supply, water through the micro filter, needle valve, check valve into the main valve control room, through the ball Industrial Valves and drainage to the downstream. Because the needle valve opening is less than the ball valve opening, the main Industrial Valves control room is greater than the water drainage speed, so the control pressure is reduced, on the main valve inlet pressure of the bottom of open the main valve to supply water to the water downstream. When pipe to stop water supply, if the downstream water flowing back, part of the return water enters the main control room, the ball valve with one-way valve, the reflux water cannot flow from the main control room, cause the main control room pressure rise gradually, slowly closing the main valve. 300 x slow close check valve structure

300 x slow close check valve, the major parts material body: QT450 disc: QT450 bonnet: QT450 stem: 2 cr13 diaphragm: acrylic cord lining butyronitrile 300 x slow close check valve scope of urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection, 300 x slow close check valve manufacturer recommendations
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